HP-IB disc drive emulation program available

I would love to see sometimg similar, but a stand-alone (no PC) device. It should be possible to do it with a microcontroller [1] and some flash memory device (CF card or whatever) and not a lot more. I think you could bit-bang the HPIB protocol with little, if any, external logic. But I don't feel able to write the firmware. [1] Yes, I did say microcontroller. It would be ridiculous to try to do this with a board of random logic :-) It would be a heck of a lot of fun trying to implement the SS/80 protocol using state machines, though <evil grin>. And me. And from what I recall he doesn't release the source code, so you can't port it. There's another problem too. It doesn't (and can't) work with GPIB cards in the PC using the TMS9914 chip. IIRC it's impossible to make an HP-compatible disk unit using a 9914 to talk to the HPIB, one part of the protocol requires you to do something the 9914 can't do (I forget the exact details). You can make a host to talk to HP drives using a 9914, though HP computers that use these drives used to use 9914s (things like the HP120, HP150, HP9000/200, etc). Then they went over to their own Medusa chip (1TL1 IIRC).The drives started out using the Intel 8291 HPIB interface (this one can do whatever it is that the 9914 can't), IIRC some later (for me) ones used the Medusa. -tony